If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You have to register
before you can reply or post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.

1345 auto wind issuesw

Following up on earlier post ( Lemania tough etc) I sourced a new red chrono hand and ten minute disk and am very happy with final result in all respects except for the auto wind function.
I have only been monitoring it since the new year and find eg.
Manually wind watch at 2200 hrs. (20 winds) Wear watch all of following day including 18 holes of golf. ( lots of swinging arms). By 2100 hrs. watch stopped (23hrs)so I give it a few gentle shakes and it goes until 0300 hrs the next morning.
I took off back case and laying watch flat face down took off rotor and turned the large connecting wheel for the winding gear a quarter turn clockwise The whole winding gear swung back to original position. I then turned it anticlockwise there was no resistance.
I am assuming this indicates the winding is working .Is this so?
Thanks.

It would be beyond my brief to think that I could help here without looking at it (and even then it is above my pay grade).
However, from memory the 1345 is uni-directional winding, clockwise.
This means that moving the rotor one way (anti-clockwise looking at the rotor) there should be no resistance and no winding.
Going the other way should encounter resistance, but it should not return to the start position, the fact that it returns would seem to insidcate that the tension generated by the winding is being lost returning the rotor, and is not being stored in the mainspring.

D

Edit - 18 holes of golf is hard work for a venerable old auto-chrono like this.....

Thanks for reply Dave you have pointed me in the right direction.
Under the chrono bridge is what's called a rachet stop spring which I believe reacts with the winding gear and I am guessing it is not engaging thereby allowing the rotor to return . Would I be correct in saying that this spring should stop the rotor rotating anticlockwise altogether.
I am getting the feeling that as I replaced the winding gear (Omega 1464 ) and differential (1465) which were lost in transit using the Omega 1040 parts list numbers ,the 1040 is bidirectional , I have bought the wrong parts. The rachet stop spring is not a part for the Omega. I do have a blurry 1345 parts list in French which is useless in matching parts with the 1040 Omega list.

I was in two minds about wearing the watch but decided it was a good one off test.

FYR Dave the above got all too much for me so I pulled the auto rotor and bridge off and worked out how it works and why mine did not.
I replaced the rachet stop spring with a new one I had and it looks to be working ok. I ran the mainspring down set the time ,gave the watch a few shakes and it went for four hours without manual winding.